Mechanical refrigerator



c. JAEGER MECHANICAL REFRIGEPJXTOH'V Filed June' 21, 1919 2 sheets-sheet 1 Patented Qct. p9, 1923.

UNITED sTATEs Favreau' ermee.

cAnL JAEGER, or MINNEAIOILIS, MINNSOTA, Assrenon or cnn-Imm 'ro WILLIAM r.` FRANKLIN, or s'r. PAUL, MINNESOTA, onn-nIGH'rH 'ro A. e. WALTER, or s'r.

PAUL, MINNESOTA, AND ONE-TENTH T WLHELM'INA MARIE ERICKSON, OF

l MECHANICAL REEEIGERATOR."

Application mea June 21, 1919. serial no. 305,852.

To all whom t may concern? Be it known that I, CARL JAEGER, a citizen' of the United States, residing at Minne apolis, in the county of Hennepin and State e of Minnesota, have invented certain new andv useful improvements in Mechanical Refrigerators;l and l do hereby declare the following to be a full, clear, and exact description y of the invention, such as will enable -others vit? skilled in the art to which it appertains to make and use the same.` My invention relates to refrigeration and has for its special object the provision of an extremely slmple and highly eiicient mechanical refrigerator particularly adapted for domestic use, but capable of beine' made in various sizes and used general for maintaining low temperatures.. Generally stated, the invention consists of thefnovel de vices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings whichv illustrate they invention, like characters indcate like parts throughoutfthe several views.

Referring to the drawings lEig. 1 is a plan view of the .improved re frigerator, some parts being -broken away,y

tus, the radiator, which is located in the at` f mosphere outside of the refri erator casing is of'a construction very simi ai' to that of the refrigerator which is located within the et so-called ice com artment...I The construction of the so-cal ed refrigerator will first v be described, as follows. L'

The head or top portion of' the refrigerator -is formed with a lower compartment 'Za-and an upper compartment 7b separated 50 by a horizontal partition 7. A plurality of outer tubes 8` are connected to and depend from the heads 7, being, as shown, `screwthreaded into the bottom plate thereof, and 1n free open communication with the com- 55 partment 7a." These tubes 8 may vary in number, according to the required refrigerating capacity, but, as shown, there are four of such tubes in rectangular disposition. Relatively small pi es or tubes 9 are tapped 80 through the partition 7* and lead from` the upper compartment 7b down through the respectivetubes 8 and terminate close tothe bottoms thereof. As shown, the lower ends of the tubes S'Iare closed by detachable heads e5 8a. inasmuch as the construction of the socalled radiator and the refrigerator, in so far as the latter has been so far described, are identical, the same or corresponding parts are indicated by the same numerals or ldentifying characters. i

Located on top ofthe casingl 5 is a comf presser indicated as an entirety by the numeral 10,'the same being of the rotary ty e, and which may, therefore, be briefly escribedbas follows: f

Reciprocatlng pump .plstons 11 working in vcylinders 12 produce artial vacuum in chamber 10a'and force t e'vapor into compartment 10 where it is condensed into liq- 80 ui'd form in a well known manner.I Pistons 11 are driven through pistbn rods'13, a wab-y Ibling head 14 and a crank, not shown, but

which latter is carried by a shaft 15 equipped with a pulley 16. 4Also, on top of the casing l85 5 is a small electric motor A17, lthe armature l shaft of whichV is equipped with a pulley 18.

belt 19 runs over the pulleys 18 and 16 to A operate the compressor in a well known manner. The motor may be automatically con.- trolled through Vthermostat and controlling circuit, or otherwise, so far as this invention is concerned. l

From the compression chamber 10" ofthe compressor;f4 a pipe 2O extends to thelowerfr'a f' chamber 7 a of the radiator. This pipe-20 isg. ,K 'u 1 shown provided with a normally open valve -From the uppervcompartment 7b.

of the radiator a pipe 21-extends-to thecompartment 7l? of the refrigerator.' -.This pipe 21 is-shown as provided with a normally open valve 215 by means of which the rate of iiow vof the liquid from the radiator to the refri erator maybe varied. f

pipe 22 extend from the lower compartment 7n ofthe refrigerator to the vacuf umpr suction chamber 10 of thecompressor.

This pipe 22 is also shown as pro- I vided with a normally open valve .22". The numeral 23 indicates a pressure ga e applied topipe 21. The numeral 24 1n icates a pressure gage appliedto pipe 22..

n the freezing of ice in cakes, small mei tallic pans are provided and these are adapted to be held between the tubes 8 of the refrigerator, by "means of supporting. lugs 26 applied to the .tubes 8 thereof, as. shown y in Fig. 4. As theacirculating refrigerating medium, I employa volatile liquid consisting preferably of4 about eigity-ive 'per cent lof'sulphurous'acid and fi een-per cent of carbonio acid. This fluid,l when about fourteei degrees above zero, Fahr., under.

- compression higher than atmospheric pres-1 sure, will'be in gaseous or vapor'form, and

from the'chamber 1'0b will be forced through pipe 20, first to lower compartment 7a of the radiator 'upper compartment 7b. In passing through the tubes of the radiator, the liquid,which, by this compression has absorbed heat, will be cooled, and from thence, will pass through pipe 21 to upper compartment 7* lof the refrigerator, and

\ from thence, through the plura ity of small i tubes 9. As'the liquid under compression is discharged from the lower-,ends of the small tubes 9 into the relativelylargetubes 8, it will be released and permitted to rapidly expand, thereby'ragiidly absorbing heat from the interior o the' ice box orrefrigerator casing 9, or, in other words, producing the requlred llow temperature therein. These relatively` small and large tubes of ,the radiator, therefore, act as expansionwalves or'- devices that make un- `necessary the use'of` theeordlnary expansion valves, and moreover, the several se'tsfofVA tubes act simultaneousl or in'unisoii, so that intense` cold will produced. The

expanded `va rs will be drawn from the re rigerator ck -to the suction chamber 10l of the compressor, through pipe 22. In

I vthis way, vby extremel simple-and eicient means, a highly eiliclent lo`.w cost refrigerating apparatus is provided. vThe eiciency (1f-this` device has been demonstrated 4,in actual practice. f What I-claim-'isz LA 'refrigeratingl device comprising a head having two chambers, relativelylarge tubesiprojecting from, one of said chambers;l relatively very small tubes extended from the otherchambers through said relatively largevtubes "and terminating near the ends thereof, and ice pans detachably supported' refrigerating tubes. y y 2. A refrigerating device comprising a head having two chambers, relatively large tubes projecting from one of said chambers, and relatively very small tubes extended Vfrom the otherchamber through said relatively large tubes' and terminating near the endsy thereof the said 4refrigerating by and located between the said tubes being in Yrectangular varrangement -andhaving lugs on their opposing sides "for, detachablysupporting ice pans.

` 3. In a refrigerating apparatus ,vthe combination with-l a casing, of au refrigerator. withinsaid casing and a radiator outside of said casing, said .refrigerator and radiator each comprising a head with upper` and. lower compartments, relativelyv o' from said lower` p vlarge tubes dependin compartments, relatively very small tubes extended from the upper compartments` and downward into t'he corresponding relatively largeftubes; a compressor a pipe v, connecting said compressorl to t e lower and lower compartments, relatively largeA tubes depending from said lower compartments, relatively very small tubes extended from the upper compartments and downof a refrigerater ward into` the corresponding relatively 'l large tubes, -av compressor, a pipe connecting said compressor to the lower chamber of said radiator, a ipe connectin the upper chamber of sai radiator to i connecting the .lower chamber of said refrigerator tosaid compressor, the ipe connecting said vradiator to -said re rigerator having a valve for controlling the rate of flow therethrough. l n

5. In a refrigerating apparatus, the combination with a casin of a refrigerator within said casing an" a radiator outside of said casing, said refrigerator andl ra-v diator each comprising a head with "upper and lowerrcompartments, relatively large tubes depending from said-lower oompart Iments, relatively very g from, the upperf compartments and downward into' ,the correspondingfrelatively large tubes,l a compressor, a'pipe connecting said vcompressor tothe lower chamber of e upperv chamberv of said refrigerator, and a pipel all tubes extended seid radiator, a pipe connecting the upper In teetimony whereof aig my signa,-

chamber of said radiator to the upper ture in` presence of two witnesses.

` erator to said compresso? and im electric Witnesses: l

chamber of said refrigerator, a pipe conmeeting the -lower chamber of said refrig- CARL' JAEGER.

motor with connections or drivingA said CLARA 1lim-Amm,

compressor. v

.BERNICE G. BAUNN. 

